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sys_swapon: simplify error flow in setup_swap_map_and_extents()

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Since there is no cleanup to do, there is no reason to jump to a label.
Return directly instead.

Signed-off-by: Cesar Eduardo Barros <cesarb@cesarb.net>
Tested-by: Eric B Munson <emunson@mgebm.net>
Acked-by: Eric B Munson <emunson@mgebm.net>
Reviewed-by: Pekka Enberg <penberg@kernel.org>
Reviewed-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Cesar Eduardo Barros 2011-03-22 16:33:33 -07:00 committed by Linus Torvalds
parent 915d4d7bc0
commit bdb8e3f683
1 changed files with 5 additions and 14 deletions
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19
mm/swapfile.c
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@ -1998,7 +1998,6 @@ static int setup_swap_map_and_extents(struct swap_info_struct *p,
sector_t *span)
{
int i;
int error;
unsigned int nr_good_pages;
int nr_extents;
@ -2006,10 +2005,8 @@ static int setup_swap_map_and_extents(struct swap_info_struct *p,
for (i = 0; i < swap_header->info.nr_badpages; i++) {
unsigned int page_nr = swap_header->info.badpages[i];
if (page_nr == 0 || page_nr > swap_header->info.last_page) {
error = -EINVAL;
goto bad_swap;
}
if (page_nr == 0 || page_nr > swap_header->info.last_page)
return -EINVAL;
if (page_nr < maxpages) {
swap_map[page_nr] = SWAP_MAP_BAD;
nr_good_pages--;
@ -2021,22 +2018,16 @@ static int setup_swap_map_and_extents(struct swap_info_struct *p,
p->max = maxpages;
p->pages = nr_good_pages;
nr_extents = setup_swap_extents(p, span);
if (nr_extents < 0) {
error = nr_extents;
goto bad_swap;
}
if (nr_extents < 0)
return nr_extents;
nr_good_pages = p->pages;
}
if (!nr_good_pages) {
printk(KERN_WARNING "Empty swap-file\n");
error = -EINVAL;
goto bad_swap;
return -EINVAL;
}
return nr_extents;
bad_swap:
return error;
}
SYSCALL_DEFINE2(swapon, const char __user *, specialfile, int, swap_flags)